Biological pretreatment of rice straw by fermenting with Dichomitus squalens

被引:41
作者
Bak, Jin Seop [1 ]
Kim, Myoung Dong [2 ]
Choi, In-Geol [1 ]
Kim, Kyoung Heon [1 ]
机构
[1] Korea Univ, Sch Life Sci & Biotechnol, Seoul 136713, South Korea
[2] Kangwon Natl Univ, Sch Biosci & Biotechnol, Chunchon 200701, South Korea
关键词
ARYL-ALCOHOL OXIDASE; WHITE-ROT FUNGI; ENZYMATIC-HYDROLYSIS; MANGANESE PEROXIDASE; PHANEROCHAETE-CHRYSOSPORIUM; MICROBIAL PRETREATMENT; LIGNIN DEGRADATION; CORN STOVER; FERMENTATION; OXIDATION;
D O I
10.1016/j.nbt.2010.02.021
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Rice straw was fermented by a wood-rot fungus Dichomitus squalens as a biological pretreatment, to increase the enzymatic digestibility of lignocellulose and promote cellulose hydrolysis. Response surface methodology was employed to optimize the fermentation medium of D. squalens for achieving the maximum volumetric activity of manganese peroxidase. The fermentation of rice straw by D. squalens for 15 days resulted in the enzymatic digestibility of 58.1% of theoretical glucose yield for the remaining glucan. In addition, a significant reduction in the crystallinity index and microstructural changes in the fermented rice straw were revealed. When the fungal-fermented rice straw was used as a substrate for ethanol production in simultaneous saccharification and fermentation, the ethanol production yield and productivity were 54.2% of the theoretical maximum and 0.39 g/L/hour, respectively, after 24 hours.
引用
收藏
页码:424 / 434
页数:11
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